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| Titel |
\textbf{Tomography of Ionosphere electron density and its abnormity analysis during Wenchuan earthquake } |
| VerfasserIn |
Xiaoya Wang, Nan Xing |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250032096
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| Zusammenfassung |
| A multiple-arc method and Kriging interpolation are applied to obtain VTEC as well as DCB
using ground-based GPS data. Given by the time variation characteristics of VTEC and DCB,
VTEC is calculated every 30 minutes as local variables, and DCB is calculated every day as
global variables. Kriging method, taking the spatial information of VTEC into account, is
useful to make VTEC more precise and stable. Meanwhile, based on 3-variable spline basis
function, we expand electron density into a linear combination of a set of grid points.
Tomography of Ionosphere electron density is made by MART. The results show the
coherence with CHAMP occultation results. We applied these two ways to process the
ground-based GPS data of Yangzi River Triangle Region in May, 2008 when the shocking
earthquake happened in Wenchuan. A simple statistic analysis reveals the response of
ionosphere to the earthquake and also the abnormal signal occurred before the earthquake. |
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